muqdadiya is the heart of shia militia power in diyala province. even in villages there are checkpoints. this is the second one that we've come to in this village. we've got to put the phone down now. i've arranged to secretly meet a disillusioned shia militiaman willing to take me into muqdadiya. he's a member of the badr organization. we've stopped on the side of the road. he's said we need to get into his car. you can see it in front. it's unmarked. he says it's known to all the militiamen in this area and that's the only safe way that we can get through checkpoints here. >> navai: he takes me into the center of muqdadiya. i can still see the signs of the battle against isis. in this town, shias and sunnis live side by side. the militia insider says some of his fellow militiamen have been taking revenge on the sunni population for isis attacks. so on my left here is a sunni mosque. you can see that it's been completely destroyed. >> navai: he takes me to another sunni mosque. i'm looking through the gates now and it's just a mound of rubble. in